What are adjustment layers?
Adjustment layers are special layers in Photoshop that will apply an
"adjustment" onto its own layer. There are many adjustments you can make
to a layer, such as: color balance, levels, hue/saturation, etc. You
create an adjustment when you feel an image needs a deliberate change or
modification to your choosing. Adjustments can quickly and easily enhance
your digital or scanned-in photographs and are used all of the time in creating
great, layer-based graphic design.
There are basically two ways to do things. Adjustments and adjustment
1. You can create an adjustment on an actual layer itself (by going
under Image: Adjustments: and then choosing an adjustment). Note:
adjustments will not work on shape layers (vectors). In this case you'll
want to make duplicate the original layer before you make any adjustments or
2. You can create an adjustment layer on top of an original layer.
This preserves the original layer, as you can easily discard the adjustment
If you are a beginner, you'll want to be careful. Always make sure that
if you are making an adjustment on a layer itself that you are certain you want
to keep that adjustment. To play it safe you should always duplicate the
original layer if you are going to make adjustments or try out some filters.
But you can easily just create an adjustment layer instead by clicking on the
adjustment layer icon on the bottom of the layers palette.
When you create an adjustment layer, it will apply to all of the layers
beneath it. For example if you had 20 layers of a complex design and
wanted to change the color balance of all of the layers (the entire document)
you would select the top layer in the layers palette and then create an
adjustment layer: color balance and then it will apply to all of your image.
You can move that adjustment layer down and layers on top of it in the palette
won't be affected. Remember that it applies to all of the layers beneath
What I have just talked about is creating an adjustment layer that will
spread across the entire space of the document. Because you have not made
a selection, an adjustment layer will spread across the document on its own
special layer. If you make an adjustment ON a specific layer, it will just
apply to that layer.
Now..if you want an adjustment layer to apply specifically to a certain layer
(instead of the entire document) for the same effect as creating an adjustment
on the layer itself; what you have to do is simply Ctrl or Cmd click on the
layer icon and get the layer selected so you see the marching ants. Then
what you do is simply create an adjustment layer of your choice (from the icon)
and it will only apply to the selected areas of the layer immediately beneath it
(because no other layers are in between it).
This is the same effect as creating an adjustment on the layer itself except
more flexible because you can easily adjust the adjustment layer attributes (by
double clicking on the adj. layer) or simply throw it away or hide it if you
don't like it. You may want to consider trying different adjustment layers
on a layer but remember you have to select the layer itself first otherwise the
adjustment layer will apply across the entire document.
You may also have to do some layer masking as certain adjustments will create
harsh and distinct differences from the rest of the document. Remember
there are these two ways to do the same thing but if you can get comfortable
with creating and using adjustment layers, they are going to save you some time.
Consider putting several layers of adjustments in a layer set for better
organization. I personally use adjustment layers all of the time and they
are used religiously in designs such as movie posters and flyers; and of course,
for image editing and retouching.
You will use adjustment layers in some of our tutorials and they are covered
extensively in practical use in the DVD
Basic Photoshop Training.
- Orion Williams copyright 2004